# WireCalc - NEC Wire Sizing — NEC ampacity, fill. Buy once.

> NEC ampacity, fill. Buy once. (iPhone/iPad app by Truck and Toolbox.)

- Source: https://appshunter.io/ios/app/wirecalc-nec-wire-sizing/id6808448692 (this page in markdown: same URL + `.md`)
- Developer: [Truck and Toolbox](https://appshunter.io/developer/1810936594)
- Category: Utilities, Productivity
- Price: $4.99
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English
- Released: 2026-09-14
- Data updated: 2026-09-17
- User reviews in markdown: https://appshunter.io/ios/app/wirecalc-nec-wire-sizing/id6808448692/reviews.md

## What is WireCalc?

Size wire, check voltage drop, and review your electrical calculations with WireCalc for iPhone and iPad. Guided steps and clearly labeled inputs help you move from circuit details to results you can inspect, copy, save, and share.

WIRE SIZING
Enter your load, voltage, run length, and installation conditions to find a conductor recommendation. See whether adjusted ampacity or voltage drop determines the size, then expand the calculation to review the sizes checked. Includes the next conductor size and a grounding-conductor sizing hint.

VOLTAGE DROP
Calculate voltage loss in volts and percent for DC, single-phase, and three-phase circuits. Compare the result with your selected limit, including parallel conductor sets.

AMPACITY
Check a conductor's capacity or find a size for a target current. Review table ampacity, ambient-temperature and conductor-count adjustments, and the terminal temperature limit.

CONDUIT AND BOX FILL
Compare conductor area with allowed raceway fill, using up to 10 conductor groups with individual quantities. Review box-fill allowances and matching standard box volumes.

EVERYDAY HELPERS
Use Ohm's Law and the kW/horsepower-to-amps helper. Save calculations to local history, copy results, or share a summary using the system share sheet.

WORKS OFFLINE
Calculations run on your device. No account, ads, in-app purchases, or subscriptions. Temperatures default to Fahrenheit; choose Celsius in More > Settings.

REFERENCE AID, NOT A CODE APPROVAL
WireCalc uses reference tables based on NEC 2023 and standard formulas. Local adopted codes and installation requirements may differ. It does not perform a complete code analysis or account for every condition of use, and it is not a substitute for the current adopted code, manufacturer instructions, or a licensed electrician's judgment. Verify all results before installation.

NEC is a registered trademark of the National Fire Protection Association. WireCalc is not affiliated with or endorsed by the NFPA.


## Version history (last 1 release)

### 1.0 — 2026-09-14

No release notes.

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All apps by Truck and Toolbox: https://appshunter.io/developer/1810936594

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-17.*